Platform: macros for easier creation of application entry points.

src/Platform/AbstractXApplication.h

@@ -296,6 +296,34 @@ class AbstractXApplication {
         Flags flags;
 };
 
+/** @hideinitializer
+@param className Class name
+
+Can be used as equivalent to the following code to achieve better portability,
+see @ref portability-applications for more information.
+@code
+int main(int argc, char** argv) {
+    className app(argc, argv);
+    return app.exec();
+}
+@endcode
+When no other application header is included this macro is also aliased to
+`MAGNUM_APPLICATION_MAIN()`.
+*/
+#define MAGNUM_XAPPLICATION_MAIN(className)                                 \
+    int main(int argc, char** argv) {                                       \
+        className app(argc, argv);                                          \
+        return app.exec();                                                  \
+    }
+
+#ifndef DOXYGEN_GENERATING_OUTPUT
+#ifndef MAGNUM_APPLICATION_MAIN
+#define MAGNUM_APPLICATION_MAIN(className) MAGNUM_XAPPLICATION_MAIN(className)
+#else
+#undef MAGNUM_APPLICATION_MAIN
+#endif
+#endif
+
 CORRADE_ENUMSET_OPERATORS(AbstractXApplication::Modifiers)
 CORRADE_ENUMSET_OPERATORS(AbstractXApplication::Flags)
 

src/Platform/GlutApplication.h

@@ -43,16 +43,13 @@ support for changing cursor and mouse tracking and warping.
 @section GlutApplication-usage Usage
 
 You need to implement at least drawEvent() and viewportEvent() to be able to
-draw on the screen. The subclass can be then used directly in `main()`, for
-example:
+draw on the screen. The subclass can be then used directly in `main()` - see
+convenience macro MAGNUM_GLUTAPPLICATION_MAIN().
 @code
 class MyApplication: public Magnum::Platform::GlutApplication {
     // implement required methods...
 };
-int main(int argc, char** argv) {
-    MyApplication c(argc, argv);
-    return c.exec();
-}
+MAGNUM_GLUTAPPLICATION_MAIN(MyApplication)
 @endcode
 */
 class GlutApplication {
@@ -269,6 +266,34 @@ class GlutApplication {
         Context* c;
 };
 
+/** @hideinitializer
+@param className Class name
+
+Can be used as equivalent to the following code to achieve better portability,
+see @ref portability-applications for more information.
+@code
+int main(int argc, char** argv) {
+    className app(argc, argv);
+    return app.exec();
+}
+@endcode
+When no other application header is included this macro is also aliased to
+`MAGNUM_APPLICATION_MAIN()`.
+*/
+#define MAGNUM_GLUTAPPLICATION_MAIN(className)                              \
+    int main(int argc, char** argv) {                                       \
+        className app(argc, argv);                                          \
+        return app.exec();                                                  \
+    }
+
+#ifndef DOXYGEN_GENERATING_OUTPUT
+#ifndef MAGNUM_APPLICATION_MAIN
+#define MAGNUM_APPLICATION_MAIN(className) MAGNUM_GLUTAPPLICATION_MAIN(className)
+#else
+#undef MAGNUM_APPLICATION_MAIN
+#endif
+#endif
+
 /* Implementations for inline functions with unused parameters */
 inline void GlutApplication::keyPressEvent(Key, const Math::Vector2<int>&) {}
 inline void GlutApplication::mousePressEvent(MouseButton, const Math::Vector2<int>&) {}

src/Platform/GlxApplication.h

@@ -32,16 +32,13 @@ Uses GlxContextHandler.
 @section GlxApplication-usage Usage
 
 You need to implement at least drawEvent() and viewportEvent() to be able to
-draw on the screen. The subclass can be then used directly in `main()`, for
-example:
+draw on the screen. The subclass can be then used directly in `main()` - see
+convenience macro MAGNUM_XAPPLICATION_MAIN().
 @code
 class MyApplication: public Magnum::Platform::GlxApplication {
     // implement required methods...
 };
-int main(int argc, char** argv) {
-    MyApplication c(argc, argv);
-    return c.exec();
-}
+MAGNUM_XAPPLICATION_MAIN(MyApplication)
 @endcode
 */
 class GlxApplication: public AbstractXApplication {

src/Platform/NaClApplication.h

@@ -160,7 +160,9 @@ namespace Implementation {
 @brief Entry point for NaCl application
 @param application  Application class name
 
-See NaClApplication for more information.
+See NaClApplication and @ref portability-applications for more information.
+When no other application header is included this macro is also aliased to
+`MAGNUM_APPLICATION_MAIN()`.
 */
 /* look at that insane placement of __attribute__. WTF. */
 #define MAGNUM_NACLAPPLICATION_MAIN(application)                            \
@@ -170,6 +172,14 @@ See NaClApplication for more information.
         }                                                                   \
     }
 
+#ifndef DOXYGEN_GENERATING_OUTPUT
+#ifndef MAGNUM_APPLICATION_MAIN
+#define MAGNUM_APPLICATION_MAIN(className) MAGNUM_NACLAPPLICATION_MAIN(className)
+#else
+#undef MAGNUM_APPLICATION_MAIN
+#endif
+#endif
+
 }}
 
 #endif

src/Platform/Sdl2Application.h

@@ -42,16 +42,13 @@ Supports keyboard and mouse handling.
 @section Sdl2Application-usage Usage
 
 You need to implement at least drawEvent() and viewportEvent() to be able to
-draw on the screen. The subclass can be then used directly in `main()`, for
-example:
+draw on the screen.  The subclass can be then used directly in `main()` - see
+convenience macro MAGNUM_SDL2APPLICATION_MAIN().
 @code
 class MyApplication: public Magnum::Platform::Sdl2Application {
     // implement required methods...
 };
-int main(int argc, char** argv) {
-    MyApplication c(argc, argv);
-    return c.exec();
-}
+MAGNUM_SDL2APPLICATION_MAIN(MyApplication)
 @endcode
 */
 class Sdl2Application {
@@ -217,6 +214,34 @@ class Sdl2Application {
         bool _redraw;
 };
 
+/** @hideinitializer
+@param className Class name
+
+Can be used as equivalent to the following code to achieve better portability,
+see @ref portability-applications for more information.
+@code
+int main(int argc, char** argv) {
+    className app(argc, argv);
+    return app.exec();
+}
+@endcode
+When no other application header is included this macro is also aliased to
+`MAGNUM_APPLICATION_MAIN()`.
+*/
+#define MAGNUM_SDL2APPLICATION_MAIN(className)                              \
+    int main(int argc, char** argv) {                                       \
+        className app(argc, argv);                                          \
+        return app.exec();                                                  \
+    }
+
+#ifndef DOXYGEN_GENERATING_OUTPUT
+#ifndef MAGNUM_APPLICATION_MAIN
+#define MAGNUM_APPLICATION_MAIN(className) MAGNUM_SDL2APPLICATION_MAIN(className)
+#else
+#undef MAGNUM_APPLICATION_MAIN
+#endif
+#endif
+
 CORRADE_ENUMSET_OPERATORS(Sdl2Application::Modifiers)
 
 /* Implementations for inline functions with unused parameters */

src/Platform/XEglApplication.h

@@ -32,16 +32,13 @@ Uses EglContextHandler.
 @section XEglApplication-usage Usage
 
 You need to implement at least drawEvent() and viewportEvent() to be able to
-draw on the screen. The subclass can be then used directly in `main()`, for
-example:
+draw on the screen.  The subclass can be then used directly in `main()` - see
+convenience macro MAGNUM_XAPPLICATION_MAIN().
 @code
 class MyApplication: public Magnum::Platform::XEglApplication {
     // implement required methods...
 };
-int main(int argc, char** argv) {
-    MyApplication c(argc, argv);
-    return c.exec();
-}
+MAGNUM_XAPPLICATION_MAIN(MyApplication)
 @endcode
 */
 class XEglApplication: public AbstractXApplication {